Genesis Chapter 26 Verse 31 - 35
31.) They rose up some time in the morning, and swore one to another. Isaac sent them away, and they departed from him in peace.
32.) It happened the same day, that Isaac's servants came, and told him concerning the well which they had dug, and said to him, "We have found water."
33.) He called it Shibah. Therefore the name of the city is Beersheba to this day.
34.) When Esau was forty years old, he took as wife Judith, the daughter of Beeri the Hittite, and Basemath, the daughter of Elon the Hittite.
35.) They grieved Isaac's and Rebekah's spirits.